diff --git a/sesman/chansrv/chansrv.c b/sesman/chansrv/chansrv.c
index 862c9314..1d1d9c1d 100644
--- a/sesman/chansrv/chansrv.c
+++ b/sesman/chansrv/chansrv.c
@@ -92,6 +92,7 @@ send_channel_data(int chan_id, char* data, int size)
       break;
     }
     sent += size;
+    s = trans_get_out_s(g_con_trans, 8192);
   }
   return rv;
 }